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Question: A company is having a new corporate website developed. In the final testing phase the download time to open the new home page is recorded for a large number of computers in office and home settings. The mean download time for the site is 2.5 seconds. Suppose that the download times for the site are normally distributed with a standard deviation of 0.5 seconds. If you select a random sample of 30 download times:
(a) What is the probability that the sample mean time is less than 2.75 seconds?
(b) What is the probability that the sample mean time is between 2.70 and 2.90 seconds?
(e) The probability is 80% that the sample mean time is between what two values symmetrically distributed around the population mean?
(d) The probability is 95% that the sample mean time is less than what value?
In 2006, the Florida poll conducted by Florida International University asked whether current environmental regulations are too strict or not too strict. Of 1200 respondents. 229 said they were too strict. Find and interpret a (a) 95%. (b) 99% con..
hen investigating a relationship between birth weight and IQ, researchers found that 258 subjects with extremely low birth weights (less than 1000 g) had Wechsler IQ scores at age 8 with a mean of 95.5 and a standard deviation of 16.0.
Suppose that the population of heights of female college students is approximately normally distributed with mean m of 66.24 inches and standard deviation s of 5.07 inches.
Draw the scatter diagram. Does it appear that x and y are related? If so, how? Test to determine whether there is evidence of a linear relationship
the following data were collected in a clinical trial to compare a new drug to a placebo for its effectiveness in
A random sample of 90 printers discovered that 25 of them were being used in small businesses. Find the 95% limit for the population proportion of printers that are used in small buisnesses.
Avalon Bakery would like you to recommend how many loaves of its rye bread to bake at the beginning of each day. Each loaf costs the bakery $3.00 and can be sold for $6.00.
deliverable length 2 - 3 pages in ms worddescribe a situation in your business or personal life that required research.
For full marks use the coded method and round your answer to 1 decimal place.Find the slope for the trend-line.What is the intercept of the trend-line.
Which of these variables are discrete and which are continuous random variables?
Is there an alternative test to the chi squared test? What if my results give an expected frequency below 5, which stats book states that these should be treated with caution?
Four students riding to school together offer a the excuse of a flat tire on their car for missing a test. On the makeup test, the professor asks the students to each identify the tire that went flat.
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